What is the function of the chloroplast? A. Breaks down sugar to make energy B. To hold the cell together C. To make animals green D. Uses sunlight to create glucose (sugar)

6.02 x \(10^{20\) formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

To convert formula units of MgCl₂ to moles of MgCl₂, we need to use Avogadro's number, which relates the number of formula units to the number of moles.

Avogadro's number (NA) is approximately 6.022 x 10^23 formula units per mole.

Given that we have 6.02 x 10^20 formula units of MgCl₂, we can set up a conversion factor to convert to moles:

(6.02 x 10^20 formula units MgCl₂) * (1 mol MgCl₂ / (6.022 x 10^23 formula units MgCl₂))

The formula units of MgCl₂ cancel out, and we are left with moles of MgCl₂:

(6.02 x 10^20) * (1 mol / 6.022 x 10^23) = 0.1 mol

Therefore, 6.02 x 10^20 formula units of MgCl₂ is equal to 0.1 moles of MgCl₂.

It's important to note that this conversion assumes that each formula unit of MgCl₂ represents one mole of MgCl₂. This is based on the stoichiometry of the compound, where there is one mole of MgCl₂ for every one formula unit.

Additionally, this conversion is valid for any substance, not just MgCl₂, as long as you know the value of Avogadro's number and the number of formula units or particles you have.

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The actual amount of substance each required or produced by the reaction is obtained by stoichiometry.

From the reaction equation;

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

Number of moles in  1.56 grams of H2(g) = 1.56 grams/2.00g/mol = 0.78 moles

If 2 moles of water yields 1 mole of H2

x moles of water yields 0.78 moles of H2

x = 2 × 0.78/1 = 1.56 moles of water

Mass of water required = 1.56 moles of water × 18 g/mol = 28 grams of water

The statement that the reaction requires 27.9 grams of H2O is true.

Also;

The number of moles in 1.55g of NaOH = 1.55g/40g/mol = 0.039 moles

If 2 moles of water produces 2 moles of NaOH

1.56 moles of water produces 1.56 × 2/2 = 1.56 moles of NaOH

Mass of NaOH = 1.56 moles of NaOH * 40 g/mol = 62.4 g of NaOH

The statement that the reaction also produces 1.55 grams of NaOH is false.

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Answer:

b. 2.8

Explanation:

To determine the amount of copper produced, we need to first balance the chemical equation for the reaction between copper sulfate and zinc. The balanced equation is as follows:

Zn + CuSO4 → ZnSO4 + Cu

From the balanced equation, we can see that 1 mole of zinc (Zn) reacts with 1 mole of copper sulfate (CuSO4) to produce 1 mole of copper (Cu). The molar mass of zinc is 65.38 g/mol, and the molar mass of copper is 63.55 g/mol.

Given that 2.9 g of zinc is consumed, we can calculate the moles of zinc:

moles of zinc = mass of zinc / molar mass of zinc

= 2.9 g / 65.38 g/mol

≈ 0.0443 mol

Since the reaction is 1:1 between zinc and copper, the moles of copper produced will be the same as the moles of zinc consumed. Therefore, 0.0443 mol of copper is produced.

Now, we can calculate the mass of copper:

mass of copper = moles of copper × molar mass of copper

= 0.0443 mol × 63.55 g/mol

≈ 2.81 g

Therefore, the correct answer is b. 2.8 g

chatgpt

The balanced equation for the reaction is:

Zn + CuSO4 -> ZnSO4 + Cu

This means that 1 mole of zinc reacts with 1 mole of copper sulfate to produce 1 mole of zinc sulfate and 1 mole of copper.

The molar mass of zinc is 65.38 g/mol, and the molar mass of copper is 63.55 g/mol.

Therefore, 2.9 g of zinc is equivalent to 0.044 moles of zinc.

This means that 0.044 moles of copper will be produced.

The molar mass of copper is 63.55 g/mol, so 0.044 moles of copper is equivalent to 2.8 g of copper.

Therefore, 2.8 g of copper will be produced.

So the answer is (b).

bardAI

Answer:

The mass of sodium sulfate formed by the comolete reaction of 120.0 grams of sodium hydroxide is 142.04 grams.

Explanation:

The balanced chemical equation for the reaction between sodium hydroxide and sulfuric acid is:

2NaOH + H2SO4 -> Na2SO4 + 2H2O

From the equation, we can see that 2 moles of sodium hydroxide react with 1 mole of sulfuric acid to form 1 mole of sodium sulfate. We can use this information, along with the molar masses of the compounds, to calculate the mass of sodium sulfate formed.

First, we need to convert the given mqss of sodium hydroxide to moles. The molar mass of sodium hydroxide is 40.00 g/mol, so:

Moles of NaOH = Mass of NaOH / Molar mass of NaOH

Moles of NaOH = 120.0 g / 40.00 g/mol

Moles of NaOH = 3.00 mol

Next, we can use the mole ratio from the balanced equation to calculate the moles of sodium sulfate formed:

Moles of Na2SO4 = Moles of NaOH / 2

Moles of Na2SO4 = 3.00 mol / 2

Moles of Na2SO4 = 1.50 mol

Finally, we can convert the moles of sodium sulfate to grams using its molqr mass of 142.04 g/mol:

Mass of Na2SO4 = Moles of Na2SO4 x Molar mass of Na2SO4

Mass of Na2SO4 = 1.50 mol x 142.04 g/mol

Mass of Na2SO4 = 213.06 g

Therefore, the mass of sodium sulfate formed by the complete reaction of 120.0 grams of sodium hydroxide is 213.06 grams.

The theory of plate tectonics explains the location of most earthquakes and volcanoes as on the boundaries of tectonic plates, most of the earthquakes or volcanoes happen.

Plate tectonics is the plates that are present in the earth's crust. These plates are of different types. These plates are always in movement. These plates are divergent, convergent, etc.

Earthquakes, volcanoes, and tectonic plates. The plate tectonics hypothesis states that Earth is a dynamic planet.

The numerous separate plates that make up its surface move and interact with one another, continually modifying and reshaping the Earth's outer layer. Tectonic plate movement causes both earthquakes and volcanoes.

Thus, the ends of the tectonic plates are the places where earthquakes or volcanoes happen.

Explanation:

# grams Sulfuric Acid formed from 22.3 g Sulfur Dioxide

\(23.2 \: g \: SO₂ \times \frac{1 \: mol \: SO₂)}{64.07g \: SO₂} \times \frac{1 \: mol \: H₂SO₃}{1 \: mol \: SO₂)} \times \frac{82.09 \: g \: H₂SO₃}{1 \: mol \:SO₂ } = 28.6 \: g \: H₂SO₃\)

# grams Sulfuric Acid formed from 5.42 g Water

\(5.42 \: g \: SO₂ \frac{1 \: mol \: H₂O)}{18.02g \: H₂O} \times \frac{1 \: mol \: H₂SO₃}{1 \: mol \: H₂O)} \times \frac{82.09 \: g \: H₂SO₃}{1 \: mol \:H₂SO₃ } = 24.7 \: g \: H₂SO₃\)

# Sulfur Dioxide used by reaction 5.42 g Water

\(5.42 \: g \: H₂O \times \frac{1 \: mol \: H₂O)}{18.02g \: H₂O} \times \frac{1 \: mol \: SO₂}{1 \: mol \: H₂O)} \times \frac{64.07 \: g \: SO₂}{1 \: mol \:SO₂ } = 19.27 \: g \: SO₂\)

# of SO₂ in Excess

\( 23.2 \: g \: SO₂ - 19.27 \: g \: SO₂ = 3.0 \: g \: SO₂\)

There are many methods which can be used to represent the concentration of a solution. Molarity, mole fraction, molality, etc. are used to represent the concentration of a solution. Here weight denotes the quantity of the substance. The correct option is A.

The concentration of a substance is defined as the quantity of the solute present in a given amount of the solution. The quantity of a solute is usually denoted as the weight of the solute. The method molarity is mainly based on the weight of the solute.

The amount of substance can be represented by weight and its units are gram and kilogram.

Thus the correct option is A.

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From the statement and the information available in the question, the pH of the solution is 12.2.

The term Ka refers to the acid dissociation constant of a substance, we can obtain this by setting up the ICE table as shown;

       C6H5O^-  +   H2O ⇄  C6H5OH + OH^-

I         0.250                           0                0

C         -X                                +X             +X

E      0.250 -x                         x                x

Now;

Kb = 1 * 10^-14/ 1.0 x 10-10

Kb = 1 * 10^-4

Kb = [C6H5OH] [OH^-]/[C6H5O^-]

1 * 10^-4 = x^2/ 0.250 -x

1 * 10^-4 (0.250 -x) = x^2

2.5 * 10^-4 - 1 * 10^-4 x = x^2

x^2 + 1 * 10^-4 x  - 2.5 * 10^-4 = 0

x=0.016 M

Given that; [C6H5OH] = [OH^-] =x

pOH = -log(0.016 M) = 1.8

pH = 14 - 1.8 = 12.2

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Answer:

Ca is calcium

Cd is cadmium

Ca in Grp 2

Cd is transition metal

...

Answer:

5.00 moles O₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

3.01 × 10²⁴ molecules O₂

Step 2: Convert

\(3.01 \cdot 10^{24} \ mc \ O_2(\frac{1 \ mol \ O_2}{6.022 \cdot 10^{23} \ mc \ O_2} )\) = 4.99834 moles O₂

Step 3: Check

We are given 3 sig figs. Follow sig fig rules and round.

4.99834 moles O₂ ≈ 5.00 moles O₂

Answer:

The answer is 10.507 KJ

Explanation:

The formula you need to use for this question is MC(delta)T:

M=Mass ( 175g)

C=Specific Heat ( depends on the element, copper=0.38 j/g.k )

and T= Temperature, where you find the change in temperature by minusing the final T with the initial T.  

so, (175g)(0.38)(184-26)= 10,507 J

since we need the answer in KJ divide 10,507 by 1000

10,507/1000 = 10.507 KJ

The balanced equations are Cd (g) + S\(_8\) (g) → CdS (g), K\(_2\)CO\(_3\) → K\(_2\)O + CO\(_2\). and a Na +  HOH → NaOH + H\(_2\). Cd (g) + S\(_8\) (g) → CdS (g) is combination reaction.

An equation per a chemical reaction is said to be balanced if both the reactants plus the products have the same number of atoms and total charge for each component of the reaction. In other words, both sides between the reaction have an equal balance of mass and charge. The balanced equations are Cd (g) + S\(_8\) (g) → CdS (g), K\(_2\)CO\(_3\) → K\(_2\)O + CO\(_2\). and a Na +  HOH → NaOH + H\(_2\).

Cd (g) + S\(_8\) (g) → CdS (g) = combination reaction

K\(_2\)CO\(_3\) → K\(_2\)O + CO\(_2\)  = decomposition reaction

Na +  HOH → NaOH + H\(_2\) = Hydration reaction

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The wave number of the compound can be calculated as shown and we are going to have 8.651 x 10^13 s^-1.

The force constant of a molecule is a measure of the strength of the chemical bonds between the atoms in the molecule. It is defined as the second derivative of the potential energy of the molecule with respect to atomic displacements, evaluated at the equilibrium geometry of the molecule.

μH35Cl = 1.627 x 10^-27 kg

v = 1/2π x (480.5kg m s^-2 / 1.627 x 10^-27 kg)^1/2

v = 0.1592 x (2.953 x 10^29 m s^-2)^1/2

v = 0.1592 x (5.434 x 10^14 s^-1)

v = 8.651 x 10^13 s^-1

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Answer: The volume of given container is 3.83 L.

Explanation:

Given: Mass of \(H_{2}\) = 0.224 g

Mass of \(N_{2}\) = 1.06 g

Mass of Ar = 0.834 g

Since, moles is the mass of a substance divided by its molar mass. Therefore, moles of given substances present in the mixture are as follows.

Moles of  \(H_{2}\) are:

\(Moles = \frac{mass}{molar mass}\\= \frac{0.224 g}{2 g/mol}\\= 0.112 mol\)

Moles of \(N_{2}\) are:

\(Moles = \frac{mass}{molar mass}\\= \frac{1.06 g}{28 g/mol}\\= 0.038 mol\)

Moles of Ar are:

\(Moles = \frac{mass}{molar mass}\\= \frac{0.834 g}{40 g/mol}\\= 0.021 mol\)

Total moles = (0.112 + 0.038 + 0.021) mol = 0.171 mol

Now, using ideal gas equation the volume is calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

\(V = \frac{nRT}{P}\\= \frac{0.171 mol \times 0.0821 L atm/mol K \times 273 K}{1 atm}\\= 3.83 L\)

Thus, we can conclude that the volume of given container is 3.83 L.

Answer:

The question wants you to determine the energy that the incoming photon must have in order to allow the electron that absorbs it to jump from

n

i

=

2

to

n

f

=

6

.

A good starting point here will be to calculate the energy of the photon emitted when the electron falls from

n

i

=

6

to

n

f

=

2

by using the Rydberg equation.

1

λ

=

R

⋅

(

1

n

2

f

−

1

n

2

i

)

Here

λ

si the wavelength of the emittted photon

R

is the Rydberg constant, equal to

1.097

⋅

10

7

m

−

1

Plug in your values to find

1

λ

=

1.097

⋅

10

7

.

m

−

1

⋅

(

1

2

2

−

1

6

2

)

1

λ

=

2.4378

⋅

10

6

.

m

−

1

This means that you have

λ

=

4.10

⋅

10

−

7

.

m

So, you know that when an electron falls from

n

i

=

6

to

n

f

=

2

, a photon of wavelength

410 nm

is emitted. This implies that in order for the electron to jump from

n

i

=

2

to

n

f

=

6

, it must absorb a photon of the same wavelength.

Answer:

\(\huge\boxed{\sf M = 0.06\ M}\)

Explanation:

No. of moles = n = 0.03 mol

Volume = v = 500 ml = 0.5 L

Molarity = M = ?

M = n / v

Put the given data in the above formula.

M = 0.03 / 0.5

\(\rule[225]{225}{2}\)

Answer: Red

Explanation:

The correct answer is  a sphybridisation in z coordinate.So to form sphybridisation we need a s orbital and a p orbital  .

In genomics, hybridization is the process by which two complementary single-stranded DNA or RNA molecules bond together to form a double-stranded molecule.The bonding is determined by the correct base pairing between the two single-stranded molecules. When one s and one p orbital in the same main shell of an atom combine to form two new equivalent orbitals, this is referred to as sphybridization.

The newly formed orbitals are known as sphybridized orbitals. It forms linear molecules with a 180° angle. Atomic orbitals include both s and p orbitals. These orbitals represent the most likely region in which we can find an electron of that atom. The primary distinction between s and p orbitals is that s orbitals are spherical in shape, whereas p orbitals are dumvell-shaped.So to form  sp hybridisation we need a s orbital and a  p orbital .

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Answer:

K / Potassium

Explanation:

Out of the list of elements provided, the element that requires the least amount of energy to remove the most loosely held electron from a gaseous atom in the ground state is K (potassium).

The amount of energy needed to remove an electron from an atom is known as the ionization energy. The ionization energy of an element depends on the atomic structure of the element, specifically the arrangement of electrons in the atom's outermost energy level (valence shell). Elements with a low ionization energy have valence electrons that are held less tightly to the nucleus, making them easier to remove.

In general, the ionization energy of an element increases as you move from left to right across a period (row) of the periodic table. This trend is due to the increasing nuclear charge (number of protons in the nucleus) as you move across the period, which leads to a stronger attraction between the nucleus and the valence electrons. However, there are some exceptions to this trend, such as K (potassium), which has a lower ionization energy than its neighbors on the periodic table (Ca and Sr).

Therefore, out of the elements listed (K, Br, Ti, and Cu), K has the lowest ionization energy and would require the least amount of energy to remove the most loosely held electron from a gaseous atom in the ground state.

Answer: Electricity and magnetism are essentially two aspects of the same thing, because a changing electric field creates a magnetic field, and a changing magnetic field creates an electric field.

Answer:How are electricity and magnetism related?

Moving magnets can make electrical currents.

Electricity and magnetism are not related.

Protons and electrons are repelled by magnets.How are electricity and magnetism related?

Moving magnets can make electrical currents.

Electricity and magnetism are not related.

Protons and electrons are repelled by magnets.How are electricity and magnetism related?

Moving magnets can make electrical currents.

Electricity and magnetism are not related.

Protons and electrons are repelled by magnets.

Explanation:

Answer:

Metals

Explanation:

Two Thirds means 75 %.

Metals account for about more than two - thirds of all elements.

The answer is: The electronic configuration of Nitrogen is \(1s^22s^22p^3\).

Electronic configuration: The electronic configuration is defined as the distribution of electrons of an atom in the atomic or molecular orbitals and is written using the labels for the subshell.

How to decide which orbital is filled first?

(Shown in image)

         \(1s^22s^22p^3\)

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Nitrogen's complete electron configuration is 12s2s22p3.

The shorthand electron configuration for noble gases is [He] 2s22p3. Nitrogen has an atomic number of 7. The nitrogen atoms' nucleus contain this many protons. An atom that is neutral has an equal number of protons and electrons. Thus, the ground state electron configuration will consist of 7 electrons in the suitable s and p orbitals (state of lowest energy). For nitrogen, the entire electron configuration is 1s22s22p. Scientists may easily express and explain how the electrons are organized around the nitrogen atom's nucleus by using the configuration notation for nitrogen (N). As a result, it is simpler to comprehend and forecast how atoms will cooperate to form chemical bonds.

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The mass of the oxygen that reacted is 70.4 g.

The reaction between iron and oxygen is called rusting and is a oxidation process. The balanced chemical equation for the reaction is:

4 Fe + 3 O2 -> 2 Fe2O3

Number of moles of iron = 168 g/56 g/mol = 3 moles

Number of moles of iron III oxide = 232 g /160 g/mol

= 1.45 moles

The mass of the oxygen that reacted is;

If 3 moles of oxygen produces 2 moles of oxide

x moles of oxygen would produce 1.45 moles ofn the oxde

x = 3 * 1.45/2

= 2.2 moles

Mass of the oxygen = 2.2 moles * 32 g/mol

= 70.4 g

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Answer:

I believe it's 5.0 g of hydrogen

Explanation:

Sorry if i'm wrong

Answer:

Over time, the plant matter transforms from moist, low-carbon peat, to coal, All types of coal also contain sulfur, which, when burned, releases toxic air pollution. Sulfur All this coal comes from mines, which are either underground or run on diesel—a major source of air toxins, nitrogen oxide, and soot.

use this formula m=n×M

Your n would be 6.25mols

Your Molar mass would be the number you get after adding the molar mass of your equation: HC2H302. Find your periodic table and look there.

And you plug in the molar number in the formula and you multiply n×M

I would help but I don't have the periodic table with me right now

The answer is 1.09 x \(10^{-35}\) J

To find the energy of a photon with a given wavelength,

                                         E = h x c x λ

You'll obtain an energy result in joules using these units (J).

According to the question,

wavelength, λ = 5.50 x \(10^{-7}\)

speed of light, c = 3 x \(10^{8}\) m/s

Planck's constant, h = 6.62607015 x \(10^{-34}\)  

E = 6.62607015 x \(10^{-34}\)  x  3 x  \(10^{8}\) x  5.50 x \(10^{-7}\)

E = 1.09 x \(10^{-35}\) J

Therefore, the energy of a photon is 1.09 x \(10^{-35}\) J

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The number of the atoms that should be the numerator is 6.02 * 10^23 atoms.

We have to note that the conversion factor is the factor that can be used in the conversion of one unit to the other. We have to note that if we are able to change the unit then we can be able to make the conversion.

We have to note that the Avogadro's number is the number of atoms that we can find in one mole of a substance and it has a value of about 6.02 * 10^23 atoms in the atom of magnesium.

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Answer:

the boiling point of solution at 3 decimal point is 100.329०C Ans.

Explanation:

given data -

molality of Nacl = 0.321 m

molal boiling point elevation constant (Kb) =0.512०C/m

# formula of change of boiling point of sample =

∆ Tb =i × Kb × m

Kb = molal boiling point of elevation constant

m = molality

i = vont's hoff factor.

Nacl is strong electrolyte and its 100% dissociate so the value of i for Nacl is 2

put value in the formula

∆ Tb = 2 × 0.512 ०C/m × 0.321m

= 0.3287

= 0.329०C

∆Tb = T'b - Tb

T'b = boiling point of solution

Tb= boiling point of solvent( water)

0.329०C = T'b - 100०c ( boiling point of water = 100०C)

T'b = 0.329०C + 100०C

= 100.329०C

hope this helps